HONOLULU — President Obama expressed misgivings about several provisions of a sweeping defense bill he signed into law on Saturday, pledging that his administration will use broad discretion in interpreting the measure’s legal requirements to ensure that U.S. citizens suspected of terrorism are not detained indefinitely by the military.

The $662 billion National Defense Authorization Act provides funding for 2012 at $27 billion less than Obama’s request and $43 billion less than Congress authorized in 2011.

The bill also contains several detainee provisions that civil liberties groups and human rights advocates have strongly opposed, arguing that they would allow the military greater authority to detain and interrogate U.S. citizens and non-citizens and deny them legal rights protected by the Constitution.